#define  _CRT_SECURE_NO_WARNINGS 1

#include<stdio.h>
void swap(int *a, int *b);
void main()
{
	int a, b;
	printf("please input two number :\n");
	scanf("%d%d", &a, &b);
	swap(&a, &b);
	printf("after swap two number is:%d, %d\n", a, b);
}
void swap(int *a, int *b)
{
	int temp;
	temp = *a;
	*a = *b;
	*b = temp;
}